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Single-screw metal screw pump stator and processing method for inner helical surface thereof

A single screw, pump stator technology, used in pump components, rotary piston/swing piston pump components, machines/engines, etc., can solve the problems of low inner hole accuracy, prone to taper, poor stiffness, etc. The effect of machining accuracy and machining efficiency, improving machining accuracy and improving service life

Inactive Publication Date: 2012-06-20
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low precision of the bored inner hole, taper is prone to occur during boring, so the inner surface roughness of the screw pump cannot meet the requirements
Moreover, due to the long boring bar and poor rigidity, it can generally only process stators of about 400mm. Even if the stator is combined in sections, the strict rules of the inner helical surface cannot be guaranteed, which seriously affects metal screw pumps. work efficiency
At the same time, this processing method is not suitable for mass production

Method used

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  • Single-screw metal screw pump stator and processing method for inner helical surface thereof
  • Single-screw metal screw pump stator and processing method for inner helical surface thereof
  • Single-screw metal screw pump stator and processing method for inner helical surface thereof

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Embodiment Construction

[0038] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0039] Such as figure 1 , figure 2 As shown, the present invention provides a single-screw metal screw pump stator 100. The stator 100 is composed of two helical bodies 1 with semicircular cross-sections that are correspondingly rotated and bonded. Surface; on each spiral body 1, be positioned at the centerline position of screwing surface (spiral surface) 11 and extend along this centerline and be provided with the groove 12 of a semicircular bottom, the cross section of described groove 12 (as image 3 As shown) is composed of a rectangle 121 and a semicircle 122 smoothly connected to the lower part of the rectangle. The grooves 12 of the two helicoids 1 are correspondingly screwed together to form the inner helical surface ...

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Abstract

The invention relates to a single-screw metal screw pump stator and a processing method for an inner helical surface thereof. The stator is formed by corresponding screwing and bonding of two helicoids of which the cross sections are semicircular in shape, and corresponding screwing surfaces of the two helicoids are helical surfaces; and a groove with a semicircular bottom is arranged in the center line position of the helical surface of each helicoid and extends along the center line, the cross section of the groove is formed by a rectangle and a semicircle which forms a smooth connection with the lower part of the rectangle, the grooves of the two helicoids are screwed in a corresponding way to form the inner helical surface of the stator, and connecting parts are correspondingly arranged on the outer walls of the two helicoids. Because the metal screw pump stator is formed by corresponding screwing and bonding of the two helicoids, an open processing method can be used by firstly processing the groove in each helicoid and then carrying out corresponding screwing and bonding on the two helicoids to form a whole. Because the grooves are processed in an open mode, the machining ofthe grooves is facilitated, and the processing accuracy and the processing efficiency are improved.

Description

technical field [0001] The invention relates to a single-screw metal screw pump, in particular to a single-screw metal screw pump stator and a method for processing the inner helicoid surface thereof. Background technique [0002] The screw pump is a device commonly used in petroleum, chemical, paper and other industries to transport viscous liquid or liquid with particles, and the stator is one of the main components of this device. Such as Figure 8A , Figure 8B As shown, it is a schematic structural view of a single screw pump stator 9, the cross-sectional profile of the internal helical surface 91 of the screw pump stator 9 is two semicircles with a radius of R (equal to the screw rotor section radius) and two lengths of 4e (e is the eccentric distance between the center of the rotor section and the center line of the stator) The oblong circle formed by the straight line segments. The double-line internal helical surface 91 of the stator is formed by the above-mention...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C15/00B23P15/00
Inventor 丁庆新刘智殷海文田应成惠坤亮
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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